Re: [PATCH] r8169: Reinstate ALDPS and ASPM support

Andrew Lunn
2018-06-05T14:11:23Z

On Tue, Jun 05, 2018 at 12:58:12PM +0800, Kai-Heng Feng wrote:
> This patch reinstate ALDPS and ASPM support on r8169.
>
> On some Intel platforms, ASPM support on r8169 is the key factor to let
> Package C-State achieve PC8. Without ASPM support, the deepest Package
> C-State can hit is PC3. PC8 can save additional ~3W in comparison with
> PC3.
>
> This patch is from Realtek.
>
> Fixes: e0c075577965 ("r8169: enable ALDPS for power saving")
> Fixes: d64ec841517a ("r8169: enable internal ASPM and clock request settings")
>
> Cc: Ryankao <ryankao@realtek.com>
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
> ---
> drivers/net/ethernet/realtek/r8169.c | 190 +++++++++++++++++++++------
> 1 file changed, 151 insertions(+), 39 deletions(-)
>
> diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
> index 75dfac0248f4..a28ef20be221 100644
> --- a/drivers/net/ethernet/realtek/r8169.c
> +++ b/drivers/net/ethernet/realtek/r8169.c
> @@ -319,6 +319,8 @@ static const struct pci_device_id rtl8169_pci_tbl[] = {
>
> MODULE_DEVICE_TABLE(pci, rtl8169_pci_tbl);
>
> +static int enable_aspm = 1;
> +static int enable_aldps = 1;
> static int use_dac = -1;
> static struct {
> u32 msg_enable;
> @@ -817,6 +819,10 @@ struct rtl8169_private {
>
> MODULE_AUTHOR("Realtek and the Linux r8169 crew <netdev@vger.kernel.org>");
> MODULE_DESCRIPTION("RealTek RTL-8169 Gigabit Ethernet driver");
> +module_param(enable_aspm, int, 0);
> +MODULE_PARM_DESC(enable_aspm, "Enable ASPM");
> +module_param(enable_aldps, int, 0);
> +MODULE_PARM_DESC(enable_aldps, "Enable ALDPS");

Hi Kai

No module parameter please. Just turn it on by default. Assuming
testing shows works.

Andrew